Fastening means



Aug. 10, 1937. H. MACKEY 2,089,908

FASTENING MEANS Filed July 30, 1936 2 SheetsSheet 1 Aug. 10, 1937. H. MACKEY 2,089,908

FASTENING MEANS Filed July 30, 1936 2 Sheets-Sheet 2 Patented Aug. 1%, 1937 PATENT QFFICE FASTENING MEANS Henry Mackey, Dayton, Ohio, assignor of twothirds to Mary Harnish, Dayton, Ohio Application July 30,

1 Claim.

The invention relates to fastening means designed primarily for use in securing a boiler sea-m protector of the general type disclosed in U. S. patent to Gage, No. 1,223,781 of April 24,

1917, owned in part by myself, although useable also for other purposes. In the protector shown by the patent, in which anchor blocks are connected with heads of the boiler seam rivets, said anchor blocks often become detached from the rivet heads due to expansion and contraction of the boiler or to burning of the block and head connecting means. Therefore, the seam protectors constructed in accordance with the patent have not been as satisfactory and eificient as they should be but the present invention aims to provide, and in actual practice, has provided, a new and improved structure which more securely connects the anchor blocks to the rivet heads.

With the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, description being accomplished by reference to the accompanying drawings.

Fig. 1 is a transverse section through a boiler seam and the protector applied thereto, showing the improved fastening means.

Figs. 2 and 3 are sectional views on lines 22 and 33 of Fig. 1.

Fig. 4 is a perspective view of one of the anchor blocks.

Fig. 5 is a perspective view of one of the protector attaching members.

Fig. 6 is a perspective View of one of the re- 35 fractory protector sections.

Fig. 7 is a detail section showing how the anchor blocks may be welded to the boiler if desired.

While the claimed invention is a securing 40 means capable of general application, it has been shown with a boiler seam protector, and the following description will be worded accordingly.

In the drawings above briefly described, I0

45 denotes a riveted seam of boiler plate II, the rivets I2 being provided with the usual inner and outer heads I3 and I4 respectively. In boilers in which the inner heads I3 are sub- J'ected to the fire, the protector is applied over 50 and connected with these heads, but in other boilers in which the outer heads I l are subjected to the fire, the protector is installed to cover the outer side of the seam and is connected with said heads I4, the latter arrangement being herein dis- 55 closed. Some of the adjacent rivet heads are 1936, Serial N0. 93,518

modified by providing them with minor areas I I at an obtuse angle to their major plate-abutting areas I4 said minor areas i l diverging from the boiler plate II and coacting therewith in forming grooves I4.

Rectangular anchor blocks I5 are provided for reception between the modified rivet heads of the seam, each of said blocks having a face I5 to abut the boiler plate I I, said face being wider than the distance between said rivet heads and terminating in feather-edges II for snug reception in the grooves I4. In forming the featheredges II, the opposite side edges l6 of each block I5 are concavedly beveled. It is an easy matter to adapt the rivet heads of any boiler for engagement with the feather-edges IT, as the necessary modification of the heads to form the grooves I I, may be readily accomplished with a cold chisel, a special diamond-point chisel, or other suitable tool, and after said edges I! have once been started into said grooves, the block may be readily driven endwise into final position. Not only do the feather edges I'I facilitate connection of the blocks I5 with the rivet heads, but they establish connections between the rivet heads and blocks which will withstand years of service which was not true of the block and head connecting means shown by the patent above mentioned.

Somewhat narrower anchor blocks I5 may be welded to the boiler wall as shown at I5 in Fig. 7 should the owner of the boiler not wish to have the seam rivets notched or disturbed in any way.

Channel-shaped protector attaching members I8 are shown, the channels I9 of said attaching members receiving the anchor blocks I5 and the rivet heads. These attaching members are secured to the anchor blocks I5 by cap screws 20 passing through openings 2I in said attaching members and threaded into openings 22 in said blocks, the heads of said cap screws being countersunk at 23 in the members I8. These members I8 and the refractory sections 24 of the protector, are relatively shaped to provide a dove-tail connection 25 which securely connects the protector sections 24 with the attaching members I8.

As the channel of the member I9 is preferably V-shape in transverse section, the ends of the anchor blocks I5 may well be beveled as shown at 26 to engage the diverging sides of said channel. Within this channel, the member I8 is preferably provided with a boss 21 to abut the outer side of the block I5.

said plate and a minor area diverging from said plate, whereby said minor areas and'said plate jointly form two grooves of acute angular cross section, said acute angular grooves being in op posed relation, and an anchor block having an opening into which to thread a member-fastening screw, said anchor block being disposed be tween said rivet heads and having two feather edges snugly received in said acute angular grooves, said anchor block having an inner face 10 terminating at said feather edges and tightly abutting said plate.

HENRY MACKEY. 

